Quasi 3-D inversion of electromagnetic data

TY - GEN

T1 - Quasi 3-D inversion of electromagnetic data

AU - Auken, Esben

AU - Christiansen, Anders V.

AU - Viezzoli, Andrea

AU - Simon, Bernhard

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The spatially constrained inversion (SCI) produces quasi-3D modeling of geoelectrical and electromagnetic data using a 1D forward solution. Information migrates horizontally through spatial constraints and allows resolution of layers that would be locally poorly resolved and it greatly reduces the influence of noisy data. The constraints between models are constructed using Delaunay triangulation, where the length of the lattices scales the constraints between the model parameters. Note that constraints are not only applied along profile lines but also between profile lines. The triangulation also allows creation of data subsets suitable for parallel computing. The SCI algorithm has been applied to helicopter borne SkyTEM data and to demonstrate the generality of the algorithm we will in this study apply it to airborne frequency data (HEM) from Banda Aceh, Indonesia. The field case proves that the SCI produces consistent results that respect the 3D geological variations of the sedimentary settings and it does efficiently suppress along flight line inversion artifacts. .

AB - The spatially constrained inversion (SCI) produces quasi-3D modeling of geoelectrical and electromagnetic data using a 1D forward solution. Information migrates horizontally through spatial constraints and allows resolution of layers that would be locally poorly resolved and it greatly reduces the influence of noisy data. The constraints between models are constructed using Delaunay triangulation, where the length of the lattices scales the constraints between the model parameters. Note that constraints are not only applied along profile lines but also between profile lines. The triangulation also allows creation of data subsets suitable for parallel computing. The SCI algorithm has been applied to helicopter borne SkyTEM data and to demonstrate the generality of the algorithm we will in this study apply it to airborne frequency data (HEM) from Banda Aceh, Indonesia. The field case proves that the SCI produces consistent results that respect the 3D geological variations of the sedimentary settings and it does efficiently suppress along flight line inversion artifacts. .

UR - http://www.scopus.com/inward/record.url?scp=85059076545&partnerID=8YFLogxK

M3 - Article in proceedings

AN - SCOPUS:85059076545

SN - 9781605607856

SP - 1193

EP - 1197

BT - 78th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2008

PB - Society of Exploration Geophysicists

T2 - 78th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2008

Y2 - 9 November 2008 through 14 November 2008

ER -